/*
 * Copyright 2024 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.pajamas.starter.integration.spring.expression;

import org.apache.commons.collections4.MapUtils;
import org.pajmas.daydream.building.AbstractEzBuilder;
import org.springframework.expression.BeanResolver;
import org.springframework.expression.spel.support.StandardEvaluationContext;

import java.lang.reflect.Method;
import java.util.Map;

/**
 * @author william
 * @since 2024/4/14
 */
public class EvaluationContextBuilder extends AbstractEzBuilder<StandardEvaluationContext> {
    private final StandardEvaluationContext evaluationContext;

    private EvaluationContextBuilder() {
        this.evaluationContext = new StandardEvaluationContext();
    }

    public static EvaluationContextBuilder newBuilder() {
        return new EvaluationContextBuilder();
    }

    public EvaluationContextBuilder rootObject(Object rootObject) {
        this.evaluationContext.setRootObject(rootObject);
        return this;
    }

    public EvaluationContextBuilder variable(String key, Object value) {
        this.evaluationContext.setVariable(key, value);
        return this;
    }

    public EvaluationContextBuilder variables(Map<String, Object> variables) {
        if (MapUtils.isNotEmpty(variables)) {
            this.evaluationContext.setVariables(variables);
        }
        return this;
    }

    public EvaluationContextBuilder function(String name, Method method) {
        this.evaluationContext.registerFunction(name, method);
        return this;
    }

    public EvaluationContextBuilder beanResolver(BeanResolver beanResolver) {
        this.evaluationContext.setBeanResolver(beanResolver);
        return this;
    }

    @Override
    protected StandardEvaluationContext internalBuild() {
        return this.evaluationContext;
    }

    public interface Customizer extends AbstractEzBuilder.Customizer<StandardEvaluationContext,
            EvaluationContextBuilder> {
    }
}
